Slip form paver with slip form release and seal



Feb. 17,1970

l. HUDIS 3,495,510

SLIP FORM PAVER WITH SLIP FORM RELEASE AND SEAL Filed Sept. 4, 1968 FIGI2 Sheets-Sheet 1 INVENTOR MICHAEL I. HUDIS 2 L, fi-ffial M I BY A f kATTORNEW M. l. HUDiS Feb. 17, 1970 SLIPFORM PAVER WITH .SLIP FORMRELEASE AND SEAL :2 Sheets-Sheet 2 Filed Sept. 4-. 1968 INVENTOR MICHAELHUDIS XWIW My FIG. 5

Z; s m g momms United States Patent O 3,495,510 SLIP FORM PAVER WITHSLIP FORM RELEASE AND SEAL Michael I. Hudis, Brookfield, Wis., assignorto Rex Chainbelt Inc., Milwaukee, Wis., a corporation of WisconsinContinuation-impart of application Ser. No. 568,262, July 27, 1966. Thisapplication Sept. 4, 1968, Ser. No. 757,448

Int. Cl. E01c 19/48 U.S. CI. 94-46 7 Claims ABSTRACT OF THE DISCLOSURE Aslip form concrete road paving machine includes slip forms movablymounted to side frames for parallel movement and power actuating meanstherefor. An elongated flexible seal connects the slip form to the sideframe from the front of the slip form back to a concrete spreadingmechanism and protects the slip form mounting linkage by keepingconcrete from spilling over the top of the slip form. The power meansincludes two sets of power cylinders, one generally vertical and theother generally horizontal to move the slip form both vertically andhorizontally away from a slab forming position.

CROSS REFERENCE TO RELATED APPLICATIONS This application is acontinuation-in-part of prior application Serial No. 568,262, filed July27, 1966 now Patent No. 3,421,418, Slip Form Paver With Slip FormRelease.

BACKGROUND OF THE INVENTION Field of the invention This inventionrelates to improvements in slip form concrete pavers and especially tomounting of slip forms and seals therefor.

Prior art Slip form concrete pavers are road making machines that moveover the path of a road bed to lay a concrete road and carry forms toform and define the sides of the concrete pavement of the road. As themachine moves these forms slip along the side of the pavement and nopermanent forms are necessary. Slip form pavers may carry a variety oftools to level the concrete to the top of the forms, vibrate theconcrete, screed or smooth the concrete surface, and finish the uppersurface of the road. Slip form paving machines are themselves known inthe art as shown for example by the patents to Perkins et al.,2,869,931, 2,976,783 and 2,976,784.

It is also known in the art of slip form pavers to adjust the form sothat the width of the slab to be poured and confined may be adjusted andto readily move the slip forms laterally clear of the concrete whilestill on the machine at the termination of a days paving so that theheaders will not adhere to the concrete while it sets overnight.

The prior art, however, leaves much to be desired in that the knownconcrete headers pivot about a vertical axis for movement and thevertical axis must be at the front of the machine causing a complicatedarrangement.

Furthermore, the mechanism for moving the slip forms and the linkage forconnecting the slip forms to the side frames for movement is exposed toconcrete which will on occasion flow over the top of the slip formsduring movement of the slip form paver. Concrete in the linkage of theslip forms, of course fouls the linkage, and when set causes the linkageto break. The concrete also causes problems if it gets in the powermechanism for operating or adjusting the position of the slip forms.

3 ,495 ,5 l0 Patented Feb. 17, 1970 It is also desirable in the art tohave slip forms which not only move outwardrelative to each other andthe center line of a concrete pavement but also move upwardly to clearbridge abutments and the like. Such were not found in the prior art.

SUMMARY OF THE INVENTION This invention provides a slip form paver withmovable slip forms which move outwardly relative to each other in thecenter of the pavement in a parallel manner and which can also moveupwardly with regard to the road bed simultaneously with the outwardmovement to further clear the pavement and to clear any other abutments.In order to prevent concrete from fouling a linkage mechanism mountingthe movable slip forms an elongated flexible seal is provided from nearthe front of the slip forms back to the concrete spreading mechanism ofthe slip form paver. The seal may be in the form of an elongatedflexible boot attached to the side frame at a point above the top of theslip form and to the top and back of the slip form. Power means in theform of sets of horizontal and vertical cylinders are connected to theside frame and to the slip form to move the slip form either vertically,horizontally or in both directions away from the side of the concreteslab.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of a portionof a slip form paver including one side embodying the movable slip formand seal of this invention.

FIG. 2 is a side elevation view looking from the outside of the slipform paver.

FIG. 3 is a transverse sectional view taken on line 3-3 of FIG. 1.

FIG. 4 is a transverse sectional view taken on line 44 of FIG. 1.

FIG. 5 is a detail elevational view of the front of a slip form lookingfrom the inside of the road bed outwardly with portions broken away forthe sake of clarity.

FIG. 6 is a detail plan view of an elongated flexible seal.

DESCRIPTION OF PREFERRED EMBODIMENT Referring to the drawing, a slipform paver 10 is of the type well known in the art includes a side frame12 on each side of the machine which is connected by transverse frameand the paver carries concrete spreader means 14 of a known type. Thepaver 10 moves on endless tracks (not shown) carried by each side frameas is well known in the art.

Each side frame 12 carries an elongated slip face form 16 for forming aside face of a concrete slab C. Since both side frames are identicalonly one has been shown and described in the drawings. Face form 16 ismounted from side frame 12 by mounting means 18 allowing it to move withboth horizontal and vertical movements of components as can be seen bycomparing FIGS. 3 and 4. Power means 20 are provided for powering themovement of the face form 16. A seal means in the form of an elongatedflexible seal 22 is provided for sealing between the side frame 12 andthe slip form 16 to prevent concrete from spilling over the top of theslip form and fouling or breaking the mounting means 18 and power means20. The slip form may have forwardly extending nose plate 24.

The side frame 12 may include a side beam 26 having secured thereto anelongated rail 28 which mounts a pair of power cylinder supports 30.

The elongated slip face form 16 has a smooth inside face 32 for formingthe edge of the concrete slab and is provided with a strengtheningbacking channel 34 as well as a plurality of vertical ribs 36. As shownin sections 3 and 4, the front end of the elongated face form v has aheight significantly greater than the lower end of the face formfollowing the concrete spreader means 14.

The mounting means 18 includes a lug 38 secured to rail 28 and aplurality of pivot links 40. The pivot links have pivots 42 and 44 forpivoting the respective ends to lugs 38 and upper ends 46 of ribs 36.

The power means 20 includes a set of vertical cylinders 48 (there beingtwo in the embodiment shown) and a set of generally horizontal cylinders50 (there being 5 in the embodiment shown). Each vertical cylinder 48has its piston rod connected to the back of the face form on pivot axis52 and the cylinder pivotally connected to an adjustable eye bolt 54.Each horizontal cylinder 50 has its piston rod provided with a pivotalyoke 56 connected to the ribs 36, and its cylinder is pivotallyconnected to a lug 58 on the side beam 26. The side beam is providedwith a slot 60 for the piston rod of cylinder 50 to extend through.

The elongated flexible seal 22 is formed as a flexible member 62 of theseal belting /2 inch thick, for example. The belting has a cutout 64 toaccommodate the cylinder support 30 and a plurality of pockets 6,6 toaccommodate the tops 46 of ribs 36 as shown in FIG. 5. In addition, aplurality of rivet or bolt holes 68 are provided for securing one sideof the flexible belting to the top and back of the face form 16 and theother side of the top of rail 28 from a point near the forward end ofthe face form as shown in FIG. 5 to a rear point at least back to theconcrete spreader mechanism 14 as shown in FIG. 1.

The nose plate 24 may have a rigid connection '70 to the front of theface form to move therewith and a transverse bracing 72 for stiffeningpurposes.

It is believed that the operation of the construction will be apparentfrom the foregoing but a brief rsum will now be given. For forming theside of a concrete slab C the cylinders 48 and 50 are extended to placethe face form 16 in the position of FIG. 3. As some of the concretebetween the face form in the slip form paver in ordinary operation wouldtend to go over the top of the slip form, seal 22 prevents concrete fromfouling up linkage 18 or the power means 20. At the end of a daysoperation, or when reaching a bridge abutment, or otherwise when it isdesirable to move the slip form upwardly or outwardly, the appropriateset of cylinders 48 or 50, or both, are energized by an operator throughsuitable hydraulic connections of a known type to move the slip form onits pivotal linkage 40 to the position of FIG. 4 or any other positionallowed by the linkage and power means to clear the sides of theconcrete slab and any other formed or said abutments such as bridgeabutments and the like.

While the invention has been particularly shown and described withreference to preferred embodiments thereof, it will be understood bythose skilled in the art that various changes in form and details may bemade therein without departing from the spirit and scope of theinvention.

What is claimed is:

1. In a slip form concrete road paving machine of the type adapted tomove over a road bed and having spaced side frames and a concretespreader means, and slip face forms carried by the side frames, meansmounting at least one of the slip face forms for movement generallyparallel to a longitudinal axis of the side frame, power means connectedto the movably mounted slip form for powering movement thereof into andout of position to function as a face form, with improvements comprisingan elongated flexible seal member connected between the slip face formand the side frame, the seal member extending from at least the front ofthe slip face form over a portion of the power means and the mounting.means positioned between the front of the slip face form and theconcrete spreader means.

2. A slip form paver as in claim 1 wherein the mounting means includes apivotal linkage connecting the top of the slip face form to the sideframe for movement parallel to a longitudinal axis of the side frame.

3. A slip form paver as in claim 2 wherein the power means includes atleast two power cylinders, one generally horizontal and one generallyvertical disposed with one end of each power cylinder connected to theside face form and the other end of the power cylinder connected to theside frame.

4. A slip form paver as in claim 3 further comprising an adjustablemounting arrangement for the end of the power cylinder connected to theside frame.

5. A slip paver as in claim 4 further comprising a pivotal connection ofthe other end of the power cylinder to the slip form along a singlehorizontal pivotal axis.

6. A slip form paver as in claim 5 wherein there is a set of horizontaland a set of vertical cylinders.

7. A slip form paver as in claim 3 wherein the elongated flexible sealmember has one edge connected to the top and back of the slip form andthe other edge connected to the side frame at a point above thehorizontal level of the top of the slip form.

References Cited UNITED STATES PATENTS 2,976,783 3/1961 Perkins 94 46 X2,993,257 7/1961 Perkins 94 46 X 3,015,260 1/1962 Pelsue 94-46 3,234,8612/1966 Appel 9446 3,257,917 6/1966 Lewis 9446 X 3,347,139 10/1967Perkins 9446X 3,354,801 11/1967 Hanson 9446 3,421,418 1/1969 Hudis 94-46NHJE C. BYERS, In, Primary Examiner

